[PATCHES] remove unused imports

[Vincent Legoll <vincent legoll gmail com>]

Remove unused imports:

- re in svn.py
- os in _null.py
- re & time in monotone.py

-- 
Vincent Legoll

Index: vc/svn.py
===================================================================
--- vc/svn.py	(révision 1153)
+++ vc/svn.py	(copie de travail)
@@ -22,7 +22,6 @@
 ### THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import os
-import re
 import errno
 import subprocess
 import _vc

Index: vc/_null.py
===================================================================
--- vc/_null.py	(révision 1153)
+++ vc/_null.py	(copie de travail)
@@ -21,7 +21,6 @@
 ### (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 ### THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import os
 import _vc
 
 class Vc(_vc.Vc):

Index: vc/monotone.py
===================================================================
--- vc/monotone.py	(révision 1153)
+++ vc/monotone.py	(copie de travail)
@@ -23,8 +23,6 @@
 ### THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import os
-import re
-import time
 import _vc